/loop➰

Mathematically, a loop➰ :== a closed🔒 string with no knots🪢 or tanglements whose path initiates and terminates at the same point.

Ludologically, a loop➰ is a simple infinite walk (ie. circuit); such that it encloses leaves (reading frames) on a loopstring➿. In both cases, a loop➰ is continuous with either no nuts, or has homologically conjoined endpoints.
/// For sake of stew choreography, a loop➰ is just a completed walk that has become unavailable for recycling.